Three-point jack.



PATENTED DEC. 25, 1906. w. F. BOSSERT.

I THREE POINT JACK. I AP1 LIOATIOH FILED 822120, 1906.

2 SHEETS-SHEET I .kRM

WILLIAMF. BOSSE'RT, OF UTICA, NEW-YORK.

THREE-POINT JACK.

' Specification of Letters Patent.

Application filed September 20, 1906.

Patented Dec. 25, 1906.

Serial No. 335,486. I

To all whom it may concern: a

Be it known that I, WILLIAM F. BOSSERT, a'citizen of the United States, residing at Utica, in thecounty of Oneida andState of New York, have invented certain new and useful Improvements inThree-Point Jacks;

and I dohereby declare the following to be a'full, clear, and exact description of the ,invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to new and. useful improvements in three-point jacks or railbenders; and the object of the invention is to produce a simple and efficient device of this nature whereby the power derived from thesame may be greater than that usually obtained by the ordinary jacks commonly in use.

More specifically, the invention comprises a rail-bending apparatus in which increased power is obtained over that obtained by the v turning of a screw and without complicated gears or worm-wheels; and it conslsts of a frame in whlchis mounted a ram actuated by means of a suitable ratchet mechanism.

and in the provision of toggle-links so arranged that excessive power may be applied to the ram by the manipulation of the ratchet means.

I My invention comprises various details of. constructlon and comblnatlons and arrangeappended claims.

v I illustrate my invention in the. accompanying drawings, inwhich- Figure 1 is a plan view of my improved rail-bender. Fig. 2 is an edge view of the invention. Fig. 3 is 'a detail view of the movable'ram-block. Fig. 4 is an end view' of the construction shown in Fig. 3. Fig. 5.

is a plan view of a modification of the invention. Fig. 6 is an edge view of the modification of my invention shown in Fig. 5. Fig. 7 is a detail view of the screw having right and left threaded portions. Fig. 8 I is a detail view of the ratchet upon the screw. Fig. 9 is a detail view of the bearing-block in which one end of the screw is mounted. Fig. 10 is a detail view of the double pawl.

Reference now being had to the drawings, A designates aframe which has a screw B mounted in a suitable shell-bearing A", which portion having the bearing is threadless as well as the shell carrying the same, and the threaded portion of the screw passes through a shell E, which has interior threads adapted to engage the threads of thescrew, and lugs E project therefrom at positions diametrically opposite, forming fulcrums carrying the pivot-pins F, to which theinner ends of the inks G are connected. A double pawl B is mounted upon a pivot B upon the handle Bflone or the other of the ends of which pawl being adapted to be thrown, so as to engage the teeth of the ratchet B, accordingly as it may bedesired to cause the screw to turn in one direction or the other, by swinging the handle B A spring B tends to hold the awl so that one or the other of its arms will be held in the ath of the teeth of the ratchet-wheel. H I I designate two stationary fulcrum-pins carried by said frame and to which the links I are pivoted at corresponding ends, the other ends of said links I being connected to pivots J, to which the outer ends of the links Gare also pivoted. 'K designates a ram block having grooves K in the ends thereof adapted to receive the ribs K formed upon the arms of said frame, and L L designate two links which are pivotally connected to the pins L, carried by said ram-block, and their inner ends connected to the pivots J. In Fig. 1 will be observed an antifriction or grooved block 0, adapted to conform to the face of the rail.or other object to be bent, and N designates a stay-rod connecting the two hooked arms of the frame.

Referring to Figs. 5 to 9, inclusive, will be seen a still further modification of my invention, in which the frame A is provided with a fixed cross-piece R, connecting the arms of the device, and fixed culcrums S have links S and S pivoted thereto, one of said links S being pivotally connected to a pin S carried by a lug S upon the shell 8, which is interiorly threaded and mounted upon the rightthreaded portion S of the screw S while the link S is pivoted to a pin S which is formed integral with the shell 8", which atter is also interiorly threaded and adapted to fit the left-threaded portion S of said screw. The ends of the screw S are mounted in a suitable bearing S in the frame of the apparatus, and the usual ratchet-Wheel B -is fixed intermediate the two threaded portions of said screw, and the handle B carrying the IIO double pawl, is mounted intermediate the sets of links, as shown clearly in Fig. 5. Links T are pivotally connected at their inner ends to lugs S upon the shells S and S and their other ends pivotally connected to the pins S which are mounted upon the head of the ram-block P, which has an antifriction-roller P journaled at its end and works through an aperture formed in a crosspiece R.

In operation it will be noted that in the construction shown in Fig. 1 of the drawings by giving a swinging motion to the handle carrying the double-ended pawl the screw may be rotated, thereby driving the ram against the rail or other object being bent, which latter has been previously engaged by the hooked arms of the frame, and by the swinging movement of said arms an excessive power may be applied by the toggle mechanism to the article being bent and much more rapidly than by the ordinary means employed in devices of this nature, relievingto a large extent the direct strain upon the screw and the threaded shells. It will be readily understood that by turning the screw illustrated in Fig. 1 in one direction or the other, the shell E may be driven in one direction or the other thereon, and, the links I having stationary fulcrums upon the arms of the frame, the links L and L will change their positions in unison with the links I, thereby raising or lowering the ram or cross-piece K, thereby exerting a great amount of power upon the rail or other article being acted upon. It will also be obvious that the amount of power so gained is distributed equally upon the four fulcrumpoints to which the outer ends of the links I and L, respectively, are connected, thereby reducing to a minimum the strain upon the screw and the threaded shell.

In the modified form illustrated in Rig. 5 of the drawings the principle is illustrated in a slightly-modified manner, in which the ram instead of having bearings at its ends and being actuated by the two sets of toggle-links in the manner disclosed is shown as having a bearing centrally in a cross piece of the frame and the toggle-links connected upon right and left threaded portions of the screw, which latter is caused to be turned by the same ratchet mechanism. It will be understood that various forms of dies or antifriction-blocks may be carried by the rams, adapting the same to the particular shape of the rail or other article being acted upon.

It will thus be seen that by the provision of the apparatus shown and described in the various figures a rail, bar, or other article may be easily bent by the increased power afforded by the simple manipulation of the handle carrying the double pawl which actuates the screw for driving the ram, thus dispensing with the complicated use of gears and wormwheels, which are commonly employed in devices of this nature.

What I claim is 1. A three-point jack comprising a frame having arms adapted for engagement with the article to be bent, a screw mounted in suitable bearings in said frame, ratchet mechanism for rotating said screw, a ram mounted in suitable bearings intermediate the arms of the frame, and toggle-link connections between the ram and screw, as set forth.

2. A threepoint jack comprising a frame having arms adapted for engagement with the article to be bent, a ram mounted in suitable bearings intermediate the arms of the frame, a right and left threaded screw mounted in suitable bearings in the frame, ratchet mechanism for rotating said screw, threaded shells mounted upon the screw, and link connections between said. shells and ram, and also link connections intermediate the shells and stationary fulcrums upon the frame, as set forth.

3. A three-point jack comprising a frame having arms adapted for engagement with the article to be bent, a ram mounted. in suitable bearings intermediate the arms of the frame, a right and left threaded screw, bearing-blocks carried by the arms of the frame and in which the ends of said screw are mounted, a ratchet-wheel intermediate the threaded portion of the screw and pawl and handle for actuating said ratchet-wheel, whereby the screw may be turned in one direction or the other, threaded shells mounted upon the screw, link connections between said shells and ram, links pivotally connected at corresponding ends to fixed fulcrums upon the frame and having pivotal connections with said shells, as set forth.

4. A threepoint jack comprising a frame having arms adapted for engagement with the article to be bent, a ram having a longitudinal movement in a bearing in a crosspiece of the frame, a screw mounted in suitable bearings in the frame and having right and left threads, threaded shells i'nounted upon the screw, links pivotally connecting the shells with said ram, links pivotally connected at corresponding ends to stationary fulcrums upon the frame and also pivotally connected to said shells, and ratchet mechanism for rotating the screw, as set forth.

5. A three-point jack comprising a frame having arms adapted for engagement with the article to be bent, a ram having a longitudinal movement in a bearing in a cross-piece of the frame, a block mounted upon said ram adapted to conform to the surface of the rail or other object being bent, a right and left threaded screw mounted in bearings in the frame, threaded shells mounted upon the screw, link connections between the shells and said ram, a ratchet-wheel upon the 5 said shells, as set forth.

6. A three-point jack comprising, a frame having arms adapted for engagement with the articleto be bent, a ram having a longitudinal movement in a bearing in a cross-piece 10 of the frame, a block mounted upon said ram adapted to conform to the surfaceof the-rail or other object being bent, a screw mounted in suitable bearings in the frame of the apparatus and parallel vwith the cross-piece carry- :5 ing said ram, right and left threads upon said screw, a ratchet fixed to the latter intermediate its threaded portions, a handle, a pawl carried thereb adapted to engage the ratchet-wheel, t readed shells mounted upon the screw and provided with lugs at positions diametrically opposite, links pivotally connecting said shells with said ram, fixed fulcrums upon the frame opposite said ram, and links ivotally connecting said fulcrums with said s ells, as set forth.

In testimony whereof I hereunto affix my signature in the presence of two Witnesses.

WILLIAM F. BOSSERT.

' Witnesses:

- H. V. D. HOWE,

ANNA BARRY. 

